"Building a House by Hermit Crab" tells us that "you can't just talk without doing it. If you have a goal, you must take practical actions to achieve it. "
Building a House by Hermit Crab mainly tells that a hermit crab in the sea wants to build a big house and publicizes it to friends. His friends also agreed and looked forward to his idea.
But after a long time, the hermit crab's friends still didn't see the hermit crab's big house. After searching for a long time, a friend of the hermit crab saw the hermit crab in a worn conch shell.